Nine bands/artists I've seen, one I have not:

Inspired by @gryffindia
  1. The Rolling Stones
  2. Bruno Mars
  3. Backstreet Boys
  4. Fall Out Boy
  5. Coldplay
  6. John Mayer
  7. No Doubt
  8. Bon Jovi
  9. Keith Urban
  10. Taylor Swift
  11. Answer is Taylor Swift
    In college my friends and I tried to get tix but they sold out too fast